* {
  padding: 0;
  margin: 0;
}

.stage {
  position: relative;
  width: 650px;
  height: 850px;
  margin: 20px auto;
  background-color: #000;
}

#canvas {
  border: 1px black solid;
}

.screen {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 650px;
  height: 850px;
  background-color: #000;
  color: #fff;
  margin: 20px auto;
  font: 24px sans-serif;
}

.screen-overlay {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 650px;
  height: 850px;
  background-color: rgba(0, 0, 0, 0.8);
  /* 透明度为 0.8 的黑色背景 */
  z-index: 10;
  /* 确保覆盖在画布之上 */
}

.game-controls {
  position: absolute;
  top: 792px;
  right: 124px;
}

button {
  margin: 20px;
  padding: 10px 25px;
  text-align: center;
  font: 14px sans-serif;
  border-radius: 25px;
}

#pauseButton {
  position: absolute;
  padding: 0;
  width: 90px;
  height: 28px;
  border: none;
  display: none;
}

ol {
  list-style-position: inside;
  padding-left: 0;
}

li {
  font-size: 15px;
}